Mal Webb - Diphthong lyrics

As a lover of linguistics, I'm intrigued by the logistics Of the oral peril lurking when a word's embarked upon But when twisted vowel and consternance are gone One word gives more grief than all of the remaining lexicon Is it the diphthong in "Goodbye" that makes it difficult? Or do the D and B conspire to trap your tongue? Or is the G right at the start what tends to be the awkward part That catches in your throat before the word has yet begun? On paper its phonetic structure's not atypical And yet the glibbest wits still choke on it each day If not the diphthong in "Goodbye", it makes no sense why We seem to find it such a tricky word to say While "Help" and "Sorry" challenge some One word can leave me dumb Every time I try, like now, to say "Goodbye".